1、简单的正则表达式:
(1)preg_match("/^(\d{18,18}|\d{15,15}|\d{17,17}x)$/",$id_card)
(2)preg_match("/^(\d{6})(18|19|20)?(\d{2})([01]\d)([0123]\d)(\d{3})(\d|X)?$/",$id_card)
(3)preg_match("/(^\d{15}$/)|(\d{17}(?:\d|x|X)$/),$id_card)
2、复杂并且严格一些的验证:
//这个可以验证15位和18位的身份证,并且包含生日和校验位的验证。//如果有兴趣,还可以加上身份证所在地的验证,就是前6位有些数字合法有些数字不合法。
function isIdCardNo(num) { num = num.toUpperCase(); //身份证号码为15位或者18位,15位时全为数字,18位前17位为数字,最后一位是校验位,可能为数字或字符X。 if (!(/(^\d{15}$)|(^\d{17}([0-9]|X)$)/.test(num))) { alert('输入的身份证号长度不对,或者号码不符合规定!\n15位号码应全为数字,18位号码末位可以为数字或X。'); return false; } //校验位按照ISO 7064:1983.MOD 11-2的规定生成,X可以认为是数字10。 //下面分别分析出生日期和校验位 var len, re; len = num.length; if (len == 15) { re = new RegExp(/^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/); var arrSplit = num.match(re); //检查生日日期是否正确 var dtmBirth = new Date('19' + arrSplit[2] + '/' + arrSplit[3] + '/' + arrSplit[4]); var bGoodDay; bGoodDay = (dtmBirth.getYear() == Number(arrSplit[2])) && ((dtmBirth.getMonth() + 1) == Number(arrSplit[3])) && (dtmBirth.getDate() == Number(arrSplit[4])); if (!bGoodDay) { alert('输入的身份证号里出生日期不对!'); eturn false; } else { //将15位身份证转成18位 //校验位按照ISO 7064:1983.MOD 11-2的规定生成,X可以认为是数字10。 var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2); var arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'); var nTemp = 0, i; num = num.substr(0, 6) + '19' + num.substr(6, num.length - 6); for(i = 0; i < 17; i ++) { nTemp += num.substr(i, 1) * arrInt[i]; } num += arrCh[nTemp % 11]; return num; } } if (len == 18) { re = new RegExp(/^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/); var arrSplit = num.match(re); //检查生日日期是否正确 var dtmBirth = new Date(arrSplit[2] + "/" + arrSplit[3] + "/" + arrSplit[4]); var bGoodDay; bGoodDay = (dtmBirth.getFullYear() == Number(arrSplit[2])) && ((dtmBirth.getMonth() + 1) == Number(arrSplit[3])) && (dtmBirth.getDate() == Number(arrSplit[4])); if (!bGoodDay) { alert(dtmBirth.getYear()); alert(arrSplit[2]); alert('输入的身份证号里出生日期不对!'); return false; } else { //检验18位身份证的校验码是否正确。 //校验位按照ISO 7064:1983.MOD 11-2的规定生成,X可以认为是数字10。 var valnum; var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2); var arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'); var nTemp = 0, i; for(i = 0; i < 17; i ++) { nTemp += num.substr(i, 1) * arrInt[i]; } valnum = arrCh[nTemp % 11]; if (valnum != num.substr(17, 1)) { alert('18位身份证的校验码不正确!应该为:' + valnum); return false; } return num; } } return false; }
3、严格的验证:
<script> var aCity={11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外"} function cidInfo(sId){ var iSum=0var info="" if(!/^d{17}(d|x)$/i.test(sId)) return false;sId=sId.replace(/x$/i,"a"); if(aCity[parseInt(sId.substr(0,2))]==null) return "Error:非法地区"; sBirthday=sId.substr(6,4)+"-"+Number(sId.substr(10,2))+"-"+Number(sId.substr(12,2)); var d=new Date(sBirthday.replace(/-/g,"/")) if(sBirthday!=(d.getFullYear()+"-"+ (d.getMonth()+1)+ "-"+ d.getDate())) return"Error:非法生日"; for(var i = 17;i>=0;i--) iSum += (Math.pow(2,i)% 11)* parseInt(sId.charAt(17- i),11) if(iSum%11!=1)return"Error:非法证号"; return aCity[parseInt(sId.substr(0,2))]+","+sBirthday+","+(sId.substr(16,1)%2?"男":"女")} document.write(cidInfo("380524198002300016"),"<br/>"); document.write(cidInfo("340524198002300019"),"<br/>") document.write(cidInfo("340524197711111111"),"<br/>") document.write(cidInfo("34052419800101001x"),"<br/>"); </script>